Scilab Function
Last update : 12/1/2004

dtsi - stable anti-stable decomposition

### Calling Sequence

  `[Ga,Gs,Gi]=dtsi(G,[tol])`

### Parameters

- `G`: linear system (`syslin` list)
- `Ga`: linear system (`syslin` list) antistable and strictly proper
- `Gs`: linear system (`syslin` list) stable and strictly proper
- `Gi`: real matrix (or polynomial matrix for improper systems)
- `tol`: optional parameter for detecting stables poles. Default value: `100*%eps`

### Description

returns the stable-antistable decomposition of `G`:

`G = Ga + Gs + Gi`, `(Gi = G(oo))`

`G` can be given in state-space form or in transfer form.

### See Also

`syslin`, `pbig`, `psmall`, `pfss`,